Or they truly do.
In: Engineering
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It’s closer to your face. That may let you see it clearer, particularly if you are short sighted.
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The biggest thing is focal length
Let us say that you are looking at an image of a small tropical fish on your TV. It is a very close up shot, so in order to get the same amount of detail in real life you would have to have the fish just a couple of inches from your face.
But if the fish actually was that close, your eyes would have to focus on it in a very different way than it does from the background. You would have a very limited vocal length and everything aside from that fish would look a little out of focus. But with a high-definition camera that is not an issue and other things that are far away from the fish can still be in good focus.
The opposite illusion can occur if you add more difference in focal depth than is actually there. Doing that you can make a very large picture look like it is a picture of a tiny miniature.
There’s several effects potentially at play here.
Angular size of details may be bigger based on the zoom of the camera and size of the screen.
Lighting and/or color grading may be controlled for better contrast.
The screen is at a fixed and uniform distance so no focal length adjustments are needed from the eyes to see different parts of the frame or track moving objects. The distance may be one that you’re more comfortable focusing at as well.
Both eyes are getting the same image and your brain can combine them for greater detail rather than using a stereoscopic set of images to combine for depth perception.
Also.. If the video is of a landscape, the atmosphere or smog might be getting in the way of you seeing it clearly… Camera lenses can filter out some of that making a clearer picture.
Have you had your eyes checked recently? You might be a little nearsighted.
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1. When viewed on a display, it’s back-lit, making it brighter than real life so its easier to see details.
2. Any pro level video has a lot of color balancing going on so you can see both dark and bright details at the same time.
3. Your eyes only see sharp details directly where you are looking, while a 4k video will look sharp all over the screen.
Because they can. That brick wall that’s 100 feet away? In real life, your vision isn’t good enough to make out the texture in the face of an individual brick. In 4K, the camera captures that detail and presents it to you 5 feet from your face (assuming the camera was set up that way – sometimes they add deliberate blurring or blurring that naturally results from camera movement due to low fps, e.g. 24 fps).
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